Resolution (sighting system) test

Page Title: Resolution (sighting system) test
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MIL-R-50746(MU)

8 August 1973

4.6.16.2 Diopter adjustment torque (-40F) test. Perform the

same procedure as specifled in 4.5.16.1 at -40 to determine

compliance with 3.3.1.15.2.

4.6.17 Telescope.

4.6.17.1 Cleanliness.

4.6.17.1.1 Defects test. This test shall be conducted by

visually examining all visible optical surfaces to determine if the

telescope assembly conforms to the requirements of 3.3.1.16.1.1.

4.6.17.1.2 Dirt test. This test shall be conducted by

visually examining telescope to determine compliance with

requirements of 3.3.1.16.1.2.

4.6.17.2 Resolution (sighting system) test. Perform this

test in accordance with the resolution test method and procedure of

MIL-O-13830 utilizing an auxiliary telescope of at least 3 power (3x)

and the resolving power chart containing four line sets specified

therein, to determine compliance with 3.3.1.16.2.

4.6.17.3 Eyepiece focus Of reticle test. The test shall be

made with the aid of a calibrated dioptometer with a magnification of

at least 3 power (3X) and a diopter range for measuring the accuracies

of the diopter knob scale as specified in 3.3.1.16.3. Adjust the

dioptometer eyepiece for best focus of the dioptometer reticle and

set the dioptometer objective scale to zero. Set the diopter scale of

the telescope under test to zero diopter. Position the dioptometer

at the telescope eyepiece assembly. While viewing through the

dioptometer, obtain best focus of the telescope assembly reticle by

adjustment of the dioptometer objective stale.The telescope reticle

shall be in best focus within the limit specified in 3.3.1.16.3,

as measured on the dioptometer objective scale. Rotate the telescope

diopter knob to the clockwise stop, note diopter setting on scale,

then rotate the diopter movement counterclockwise to stop. Note

diopter setting on diopter scale to determine compliance with the

requirement specified in 3 .3.1.16.3 for ran-ge of focus.

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